Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC

NOTE:

This DTC may set when a scan tool or other electronic device is unplugged and plugged in again (to the Diagnostic Connector) while the Ignition remains in the ON position.

NOTE:

For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Selecting any of the network components allows access to the source of the problem.

Ignition on, engine not running.
With the scan tool, select view DTCs.
Is the DTC Active at this time?

Yes
- Perform the CAN C BUS NO RESPONSE Diagnostic procedure. Refer to CAN C BUS NO RESPONSE .
No
- Perform the Stored Lost Communication DTCs diagnostic procedure. Refer to STORED LOST COMMUNICATION DTCS .